文献类型：期刊文献

英文题名：Enhanced catalytic performance of hierarchical Zn/ZSM-5 with balanced acidities synthesized utilizing ZIF-14 as porogen and Zn source in methanol to aromatics

作者：Liu, Xinhui[1];Yan, Chen[1];Wang, Yilin[1];Zhang, Peng[1];Yan, Siyan[1];Wang, Hanbin[1];Zhuang, Jianguo[1];Zhao, Yitao[1];Wang, Yuchen[1];Yu, Yijun[1];Zhao, Qichao[1];Zhu, Xuedong[1];Yang, Fan[1]

机构：[1]East China Univ Sci & Technol, Engn Res Ctr Large Scale Reactor Engn & Technol, Minist Educ, Shanghai 200237, Peoples R China

年份：2023

卷号：270

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20230713582181);WOS:【SCI-EXPANDED(收录号:WOS:000944859500001)】；

基金：Acknowledgments The authors are grateful for the financial support from National Natural Science Foundation of China (21776076) and the Funda- mental Research Funds for the Central Universities (JKA01211710) . The authors also thank Research Center of Analysis and Test of East China University of Science and Technology for the help on the characterizations.

语种：英文

外文关键词：Zn-based MOFs; Zn source; Zn/ZSM-5; Methanol aromatization

摘要：A series of Zn loaded ZSM-5 (Zn/ZSM-5) zeolites were prepared utilizing either Zn(NO3)(2) or Zn-based MOFs (ZIF-61, ZIF-8 and ZIF-14) as Zn sources to explore their effects on the catalysts' physiochemical properties through characterizations and simulations. Results revealed that hierarchical structures containing meso- to macro- pores of 10 similar to 80 nm aside from the intrinsic micropores were constructed profiting from the use of Zn-based MOFs. On the other side, lager proportions of medium acid and Lewis acid sites were generated by more Zn(OH)(+), whose content was proven to be inextricably linked to the binding energy between Zn and ligand as well as local charge valence state of Zn. Benefitting from hierarchical structures and balanced acidities, Zn/Z5(ZIF-14) employing ZIF-14 as Zn source demonstrated higher aromatic selectivity and longer catalyst lifetime (50.9 % and 26 h) than the microporous counterpart synthesized from zinc nitrate hexahydrate (42.1 % and 20 h) in methanol to aromatics (MTA) reaction.(c) 2023 Published by Elsevier Ltd.